[Tfug] Cable modem

[arizray at comcast.net]

OK I understand it locking onto a MAC address etc. One time I powered it off but I was told it had battery backup so I am not sure if it actually restarted. I am currently working the internet via my router then the modem. I tried to direct connect to the modem to no avail. I will try again, shutting down the computer and the modem, connecting directly to the modem only but in the past Iended up with no connection. 


RF Parameters Downstream 
	Freq/Power: 	591.000 MHz 	-1 dBmV 	
	Signal to Noise Ratio: 	38 dB 	
	Modulation: 	QAM256 	

Upstream 
	Freq/Power: 	32.000 MHz 	38 dBmV 	
	Channel Type: 	DOCSIS 2.0 (ATDMA) 	

	Symbol Rate: 	5120 kSym/sec 	

	Modulation: 	QAM64 	
	Status System Uptime: 	4 days 8h:12m:48s 
Computers Detected: 	1 
CM Status: 	Telephony-AC Power Iso OFF Reg Complete 
Time and Date: 	TUE APR 14 21:53:03 2009 
	Interface Parameters 	Interface Name 	Provisioned 	State 	Speed 	MAC address 
LAN 	Enabled 	UP 	100 	00-15-CE-91-6F-4A 
CABLE 	Enabled 	UP 	---- 	00-15-CE-91-6F-4B 
MTA 	passWithWarnings 	UP 	---- 	00-15-CE-91-6F-4C 
----- Original Message ----- 
From: "Zack Williams" <zdwzdw at gmail.com> 
To: "Tucson Free Unix Group" <tfug at tfug.org> 
Sent: Tuesday, April 14, 2009 6:25:32 PM GMT -07:00 U.S. Mountain Time (Arizona) 
Subject: Re: [Tfug] Cable modem 

> I need some ideas about troubleshooting my internet setup. I have two Linux 
> boxes (Ubuntu 9.04b) accessing the internet via a wired router. I wish to 
> try accessing the internet directly through the cable modem so that I can do 
> some troubleshooting. When I follow the procedure, ie; shutting everything 
> down, starting the modem first then the box I cannot establish a connection. 
> Since I use LINUX, the cable tech help blushed and said they only support 
> Windblows and Mac. They do however support my money so that was a dead end. 
> I pictured them spraying their headset with Lysol after hanging up from me. 

Most cable modems lock to the first MAC address that is connected to 
them. You have to power cycle the modem every time you connect a new 
ethernet port to it. 

Most DOCSIS 2.0 modems have a diagnostic page at http://192.168.100.1 
that you can check out to see modem connection status. 

I'm not sure if you're still connected through the router, or directly 
to the modem - could you better describe your current network setup? 

- Zack 

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